SM465/NP205 vs TH350/NP205 - Pirate4x4.Com : 4x4 and Off-Road Forum
 
Pirate4x4.Com : 4x4 and Off-Road Forum  

Go Back   Pirate4x4.Com : 4x4 and Off-Road Forum > Brand Specific Tech > Chevy
Notices

Reply
 
Share Thread Tools Display Modes
Old 11-01-2008, 09:31 AM   #1 (permalink)
Registered User
 
Join Date: Nov 2001
Member # 8273
Location: NC
Posts: 521
SM465/NP205 vs TH350/NP205

I've got an SM465/NP205 in my rig (FJ40/buggy), and I'm thinking about swapping to a TH350/NP205.

I have read that the length of the 465/205 from the front of the bellhousing to the rear output is the same length as the 350/205. Is this correct?

The more important question is whether or not the 2 mount holes on the adapter would mount in the same location. I need to know if my current crossmember will work.
Charles is offline   Reply With Quote
Old 11-01-2008, 10:21 AM   #2 (permalink)
Registered User
 
Join Date: Sep 2002
Member # 13786
Location: moved 7 miles to colfax, ca.
Posts: 4,299
Correct, they are identical length. The mounting on the 350/205 combo is .750
longer
KWTMECH is offline   Reply With Quote
Sponsored Links
Old 11-01-2008, 03:36 PM   #3 (permalink)
Rock God
 
enigma2y0u's Avatar
 
Join Date: Oct 2004
Member # 36955
Location: Aztec, NM
Posts: 1,081
Can I hijack a bit. Why are you switching? I have a th350 and just bought the 205 for it, but don't yet know if I am going to regret it. I kinda want a 465.

I read on here that a th350 with a manual valve body is maybe just as fun/good/etc., but the main reason for my switch is when i am in the snow and mud rocking the truck always does an awsome job of getting out. Then on the flip side, the wife will want to try driving if I keep the auto.
enigma2y0u is offline   Reply With Quote
Old 11-02-2008, 07:54 AM   #4 (permalink)
Registered User
 
Join Date: Oct 2008
Member # 122044
Location: Fairbanks Alaska
Posts: 226
i have seen two different lengths for the 465/205 combo (i own them both) the coarse 10spline is i think about 3in shorter the the 32 spline.but that is on the frount out put never checked the rear. now not sure on the length of the 350/205.

Last edited by subranger; 11-02-2008 at 08:09 AM.
subranger is offline   Reply With Quote
Old 11-02-2008, 08:18 AM   #5 (permalink)
Registered User
 
trkklr77's Avatar
 
Join Date: Apr 2004
Member # 29016
Location: galt ca, because i wanted my own backyard
Posts: 6,086
yes your crossmember will work.

yes there are few different over all lenght setups but they will mount in the same holes, thought a new setup may use a different cross and adapter it will swap in almost directly.

72-mid 80's 465 will be 10spl, will use the same cross and bushings. can have slip or fixed out put.

mid 80's-mid 90' will have aluminum top, 32 spl, most likely slip rear out put.
there are 2 different cross members but they are hit or miss.
why swap, because you get a super low granny gear, and anyone who argues "torque converter multiplication" has never wheeled a 465. a 465 will get you home. a 350 will stop dead if it fails.
trkklr77 is offline   Reply With Quote
Old 11-02-2008, 11:12 AM   #6 (permalink)
Registered User
 
Join Date: Oct 2008
Member # 122044
Location: Fairbanks Alaska
Posts: 226
i agree with trkklr77 the 465 is damn near bullet proof .but still have to look out for a few things like keeping your bellhousing bolts tight and making sure that your mounts are in good shape and hopping when trying to get unstuck.

with that being said i love the 465 yeah in the deep mud it's pick and shoot for the gears but i don't have to worry about water getting in to the trans as much. and if it does just drain and put new oil in. a 350 most likely would be toast. just drained all the oil and water out and put fresh oil back pulled the spark plugs then bump the started until no more water comes out of the cylinders put the plugs back in then fired her back up


Last edited by subranger; 11-02-2008 at 11:18 AM.
subranger is offline   Reply With Quote
Old 11-03-2008, 07:02 PM   #7 (permalink)
Rock God
 
blazerboy85's Avatar
 
Join Date: Apr 2008
Member # 112787
Location: loomis ca
Posts: 1,020
Quote:
Originally Posted by subranger View Post
i agree with trkklr77 the 465 is damn near bullet proof .but still have to look out for a few things like keeping your bellhousing bolts tight and making sure that your mounts are in good shape and hopping when trying to get unstuck.

with that being said i love the 465 yeah in the deep mud it's pick and shoot for the gears but i don't have to worry about water getting in to the trans as much. and if it does just drain and put new oil in. a 350 most likely would be toast. just drained all the oil and water out and put fresh oil back pulled the spark plugs then bump the started until no more water comes out of the cylinders put the plugs back in then fired her back up

why does it like there is moss growing on your rear bumper
__________________
WHEELING: THE MOST FUN YOU CAN HAVE WITH YOUR CLOTHES ON........1985 blazer 1980/82 trazer 02 LB7 2500HD 85 3500 crew cab
blazerboy85 is offline   Reply With Quote
Old 11-03-2008, 07:13 PM   #8 (permalink)
Registered User
 
Join Date: Oct 2008
Member # 122044
Location: Fairbanks Alaska
Posts: 226
Quote:
Originally Posted by blazerboy85 View Post
why does it like there is moss growing on your rear bumper
beacause that was at the bottom of the pond. i was backing across when i got to the other bank the rear started going up the front went down
subranger is offline   Reply With Quote
Old 11-07-2008, 07:14 PM   #9 (permalink)
Registered User
 
Join Date: Nov 2001
Member # 8273
Location: NC
Posts: 521
Quote:
Originally Posted by enigma2y0u View Post
Why are you switching?
I'm thinking about switching to an automatic to have a little more control in technical areas. The deciding factors will be if my crossmember and driveshafts will work with minimal to no modifications.
Charles is offline   Reply With Quote
Old 11-22-2008, 05:19 AM   #10 (permalink)
Registered User
 
Join Date: Nov 2001
Member # 8273
Location: NC
Posts: 521
Would the driveshaft lengths be affected by swapping to the TH350?
Charles is offline   Reply With Quote
Old 11-22-2008, 09:42 PM   #11 (permalink)
Registered User
 
Grumpy_old_fart's Avatar
 
Join Date: Jun 2003
Member # 20147
Location: Oakland Orygun
Posts: 6,583
Send a message via Yahoo to Grumpy_old_fart
there are 2 different length sm465/np205 setups.

the easy way to ID the two is by looking at the adapter. if its a "racetrack pattern" 8 bolt adapter, its short, and you probably wont have to change driveshafts.

if its long, and a 6 bolt round faced adapter, you will probably need to change the driveshafts.
__________________
Empathy, apathy, sympathy.
Sympathy is between shit and syphilis in the dictionary.
Grumpy_old_fart is offline   Reply With Quote
Old 11-23-2008, 05:27 AM   #12 (permalink)
Registered User
 
Join Date: Nov 2001
Member # 8273
Location: NC
Posts: 521
Quote:
Originally Posted by Grumpy_old_fart View Post
there are 2 different length sm465/np205 setups.

the easy way to ID the two is by looking at the adapter. if its a "racetrack pattern" 8 bolt adapter, its short, and you probably wont have to change driveshafts.

if its long, and a 6 bolt round faced adapter, you will probably need to change the driveshafts.
My adapter is the figure 8 pattern.

So I should be good on the driveshafts and crossmember, right?
Charles is offline   Reply With Quote
Old 12-01-2008, 10:55 AM   #13 (permalink)
Registered User
 
jarednfischer's Avatar
 
Join Date: May 2008
Member # 114208
Location: Beaverton, OR
Posts: 29
So if I have a 4.3L F.I. Vortec, 8 bolt adapter, SM465, and NP205, I can directly swap over a TH350 without any other modifications or issues?
__________________
Suzuki Samurai | 4.3L Vortec V6 | 30 Spline Longfields | Toyota Axles | YJ Suspension | 36" Swampers
jarednfischer is offline   Reply With Quote
Old 12-01-2008, 12:57 PM   #14 (permalink)
Registered User
 
Grumpy_old_fart's Avatar
 
Join Date: Jun 2003
Member # 20147
Location: Oakland Orygun
Posts: 6,583
Send a message via Yahoo to Grumpy_old_fart
um.. 10 spline input for 4 speed.
27 spline input for th350

you need to change input shafts in the transfer case, and get the th350-np205 adapter with drive sleeve.

unless of course, you have a th350/np205 setup already assembled.
__________________
Empathy, apathy, sympathy.
Sympathy is between shit and syphilis in the dictionary.
Grumpy_old_fart is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -7. The time now is 05:38 PM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0 ©2011, Crawlability, Inc.